Overview
Osteospermum corymbosum DC. var. rotundifolium DC., commonly known as round-leaved cape daisy, is a flowering plant species belonging to the Asteraceae family. The plant is native to Southern Africa and is widely cultivated in gardens and parks worldwide for its ornamental value.
General Appearance
Osteospermum corymbosum DC. var. rotundifolium DC. is a herbaceous perennial that can grow up to 30cm in height with a spread of 20-30cm. The plant has rounded leaves that are dark green and fleshy. The flowers bloom in clusters from late spring to early summer, and are approximately 5cm in diameter with a bright yellow center surrounded by white petals that are bordered with a pink or purple margin.
Common Names
Osteospermum corymbosum DC. var. rotundifolium DC. is commonly known as the round-leaved cape daisy, Cape daisy or African daisy.
Uses
The round-leaved cape daisy is mainly grown for its ornamental value in gardens and parks. It is a popular plant choice for containers or as a ground cover in sunny areas. The flowers are attractive to bees, butterflies, and other pollinators, making it a popular choice for gardens that support biodiversity. The plant is relatively easy to grow and requires minimal maintenance, making it suitable for novice gardeners.
Light Requirements
Osteospermum corymbosum DC. var. rotundifolium DC. requires full sunlight to grow properly. It should be exposed to direct sunlight for at least six hours every day. Therefore, it is better to plant this species in a location where it can receive bright sunlight all day long.
Temperature Requirements
The ideal temperature for the growth of Osteospermum corymbosum DC. var. rotundifolium DC. is between 18°C to 25°C. It can also tolerate extreme temperatures ranging from 5°C to 35°C. However, care should be taken to protect the plant from frost and extremely high temperatures, which can lead to damage or wilting of the leaves.
Soil Requirements
Osteospermum corymbosum DC. var. rotundifolium DC. prefers well-drained soil that is rich in organic matter. Loamy soil is ideal for the growth of this plant. The soil should have a pH range of 6.0 to 7.5. The plant can tolerate acidic or alkaline soils to some extent, but it grows best in neutral soil.
The soil should be moist but not waterlogged. Overwatering can lead to root rot, which can damage the plant. Therefore, it is essential to check the soil for moisture levels before watering the plant. The addition of organic matter to the soil can improve its texture and fertility, leading to better plant growth.
Cultivation methods
Osteospermum corymbosum DC. var. rotundifolium DC. is cultivated as a perennial plant under suitable climatic conditions. The plant prefers a warm, sunny location with well-draining soil. It requires a location with partial shade in hot and dry climates. The plant can tolerate temperatures down to -5?. It can be grown from seeds, cuttings, or by division.
Watering needs
The plant requires moderate watering after planting and through its early growth stages. Once established, it is a drought-tolerant plant that requires occasional watering. Overwatering can lead to the development of root rot and other fungal diseases. The plant prefers well-drained soil to prevent waterlogging. It is recommended to water the plant early in the morning or late in the afternoon, avoiding the hot mid-day sun.
Fertilization
The plant requires regular fertilization during its growing season to maintain optimal growth and flowering. A balanced NPK fertilizer can be applied to the soil every two to three weeks during the growing season. Alternatively, a slow-release fertilizer can be applied during the first few weeks of the growing season. Avoid over-fertilizing the plant as it can lead to excessive foliage growth and fewer flowers.
Pruning
Osteospermum corymbosum DC. var. rotundifolium DC. requires occasional pruning to promote new growth and flowering. Deadheading can be done once the flowers have withered and died. This involves removing the dead flowers and any dead or yellowing leaves. Pruning can also be done to maintain the shape and size of the plant. It is recommended to prune the plant in late winter or early spring before the growing season.
Propagation of Osteospermum corymbosum DC. var. rotundifolium DC.
Osteospermum corymbosum DC. var. rotundifolium DC. can be propagated through various methods including:
Seeds
The most common method of propagation is through seeds. The seeds should be planted about 1/8 inch deep in a good quality soil mix. Keep the soil moist but not waterlogged and make sure the plants are kept in a warm, well-lit area. Germination usually occurs within 7-14 days.
Cuttings
Osteospermum corymbosum DC. var. rotundifolium DC. can also be propagated through stem cuttings, which should be taken in the early summer. Cuttings should be 4-6 inches long and should have at least two nodes. Remove the lower leaves and dip the cut ends in rooting hormone. Plant the cuttings in a well-draining soil mix and keep them moist. After about 4-6 weeks, the cuttings should root and can be transplanted to individual pots.
Division
Dividing established plants can also be a method of propagating Osteospermum corymbosum DC. var. rotundifolium DC. This should be done in the spring or fall. Carefully dig up the plant and separate the root ball into several sections, making sure each section has some roots intact. Replant the divisions immediately in well-draining soil mix and keep the soil moist until the plants are established.
Disease and Pest Management for Osteospermum corymbosum DC. var. rotundifolium DC.
Osteospermum corymbosum DC. var. rotundifolium DC., commonly known as African Daisy, is a beautiful flowering plant that is often cultivated for ornamental purposes. To ensure healthy growth and blooming of the plant, it is important to manage the diseases and pests that can affect it. Here are some common diseases and pests that might affect the plant:
Diseases
1. Powdery Mildew: This is a common fungal disease that affects the leaves of the plant. The fungal growth appears as a white, powdery coating on the leaves. It can cause the leaves to wither and die. To manage this disease, it is essential to provide good air circulation around the plant. Ensure that the plant is not planted too close together, and avoid overhead watering. Applying fungicides can also help manage the disease.
2. Fusarium Wilt: This is a fungal disease that affects the roots and stems of the plant. The symptoms include wilting of the upper leaves and yellowing of the lower leaves. The plant may eventually die. To manage this disease, avoid overwatering the plant and improve drainage. Fungicide applications can also help manage the disease.
Pests
1. Aphids: These are small, soft-bodied insects that can infest the plant in large numbers. They suck the sap from the leaves and can cause them to curl and distort. To manage an aphid infestation, you can try spraying the plant with a strong jet of water to dislodge the insects. Alternatively, insecticidal soap or neem oil can be applied.
2. Spider Mites: These are tiny insects that feed on the undersides of the leaves. They can cause discoloration, leaf drop, and even death of the plant. To manage a spider mite infestation, you can try spraying the plant with water regularly to increase humidity around the plant. Applying insecticidal soap or neem oil can also help manage the infestation.
By being proactive in managing the diseases and pests that might affect Osteospermum corymbosum DC. var. rotundifolium DC., you can ensure healthy growth and beautiful blooming of this ornamental plant.
